Island



rol

UNITED STATES PATENT OrEicE.

WILLIAM H. SAY'VYER, OF PROVIDENCE, RHODE ISLAND.

CUT-OUT FOR BURGLAR-ALARMS.

SPECIFICATION forming part of Letters Patent No. 252,260, dated January10, 1882.

Application filed September 24, 1881.

To all whom it may concern:

Beit known that I, WILLIAM H. SAWYER, a citizen of the United States ofAmerica, residing at Providence,in the county of Providence and State ofRhode Island, have invented certain new and useful Improvements inGut-Outs forBurglar-Alarms; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertaius to make and usethe same, reference being had to the accompanying drawings, and toletters or iigures of reference marked thereon, which form a part ofthis specification.

This invention relates to a device by means of which a person withknowledge how to use the same may temporarily short-circuit tbecircuit-closer in a burglar-alarm electric circuit, and be enabled toopen a door guarded by a burglar-alarm without causing said alarm tosound, and having again closed the door may restore the circuit toitsnormal condition. Its object is to enable authorized persons to enter ahouse by a door so guarded without disturbingtheinmates, as in tbecasewhen one or more members of a household should be out after the othershave, retired at night.

I will describe and illustrate my present invention in connection withthe circuit-closer for burglar-alarms which is-shown and dscribed inLetters Patent No.187,674, granted to me on the20th day of February,1877, though it may be used with other Ycircuit closers as well. 1

In the accompanying drawings, Figure l is a view in elevation of an opendoor and a part of its casing, with the circuit-closer arranged in thedoor-jamb and the cut-out, shown in dotted lines, arranged in thecasing. Fig. 2 is a partial longitudinal central section of thecircuit-closer. Fig. 3 is a similar section ot' the cut-out. Fig. et isa section of the same on a plaire indicated by the line a' x; and Fig. 5is a section in a plane indicated by line y y.

In Fig. l the circuit closer A is shown in full lines as arrangedinthejamb of the door, with its piston B projecting, as shown in Fig. 2.rIhis piston is metallic, and slides in a hollow metallic case, Q, andhas extending rearwardly from it a rod, b, having a shoulder, b', andcarrying a sliding metal collar, b2, which is normally forced againstsaid shoulder by a spring, b3. The portion of the rod b rearwardlybeyond the shoulder slides in a tubular (No model.)

guide, D, of nonconducting material, which is supported by a tubularmetallic shell, F,'

which is in turn supported by an insulatingband, Gr, the main portion ofwhich iits in the end of the metal case C. The metal shell F has arearwardly-projecting finger f, and the case O has arearwardly-projecting linger o, these ngers being the points to whichthe terminals of the alarm-circuit are connected. The piston B is forcedoutward by a spring, B', its outward movement being limited by a head,bvot1 the rod b, which strikes the nonconducting guide D. When the dooris closed its rear edge forces the piston B and its rod b rearwardly,and the sliding metallic collar b makes contact with the inner end otthe metal shell F, thus forming a metallic connection between the ngersf and ctlirough shell F, collar 1,2, rod b, piston B, and case O.

Referring to Fig. 1, the wires w w lead from the fingers f and c andjoin with the wires to2 w3, which lead respectively to the oppositepoles of an electric battery, (not shown in the drawings,) and in one ofthese wires is supposed to be included an alarm, which is held ont ofoperation when the circuit is closed, but sounds when the circuit isbroken. The circuit, as will be seen, would be broken at thecircuit-closer by opening the door, and it is to prevent the soundingot' the alarm by such breaking which is the function ofthe cutout, whichl will now describe.

The letter H-designates a hollow cylindrical casing. (Shown in sectioninFig. 3.)- Itis provided with a head, I, ot' greater diameter thanitself, and having a central aperture. The opposite end ot' the case isalso closed, except a central aperture, and a metal rod, K, passesthrough the casingand the apertures in its closed rear end and head I.The rod has fixed upon it, insidethe casing, abevel-faced ratchetwheel,L, with the teeth of which engages a spring-pawl, l, which is secured tothe outside of the casing, and .has its tip projecting inwardly throughan opening in the same. AA spiral spring, m', surroundsthe rod K, insidethe casing, and has one end bearing against the ratchet-wheel and theother against the head I, so that the rod K, being loose in itsbearings, is normally forced rearwardly, the ratchet-wheel bearingagainst. the end of the casingoutside of the head l. The rod K carries aradial metallic finger, N.

In front of the head I a metal disk or plate,

IOO

M, is supported by pillarsp. This plate has a central aperture ot'proper size to receive the rod K, and t'rom this aperture is cut aradial slot, m, of proper size and shape to permit the passage of thefinger N. A portion ofthe entire thickness of the plate M is cut awayfrom its perimeter toward its center, and in lieu of the metal cnt awayis inserted a block, O, of nonconducting material, preferably h a rdrubber. A ush metal plate is let in the outer face ot this block ot'non-conducting material, said plate beine,` narrower and shorter thanthe block, so that it will not touch the metal plate M.

In the outer edge of the plate Q is fixed a metal screw, q, and asimilar screw, q',is fixed in the edge ot' plate M, these screws servingas means ot' attaching the wires l104205, which form a portion of ashort circuit, as will be seen farther along.

In front ot' the plate M an escutcheon, It, is supported by shortpillars p'p', and is provided witha central key-hole, through which akey may beinserted to engage the square pin lr, projecting from the endot' rod K, and also withsuitable screw-holes to enable it to be securedto the inside ot' the door-casing, or in other suitable position.V

To the rear end of the rod K another rod, K', is attached by a universaljoint, s, said rod K' having a squared pin, t, projecting` from its freeend to enter a key. The end of the rod K' .is to have a bearing in anescntcheon, as at T, iixed upon the outside t'acing ofthe door-frame, orin any other suitable position, and the uuiversal joint obviates thenecessity ot' arrang ing the rods K' and K directly in line, shouldconvenience require otherwise.

The cut-out as now described is to be located preferably behind thejamb, with the squared pin tof rod K' arranged for access with a keyfrom outside the door, and the squared pin of the rod K t'or access fromthe inside. Supposing the wires to lead from the circuit-closer to thebattery, as shown in Fig. 1, the branch wires 'wA1 and 105 lead fromsaid wires to the screw q of plate Q, and screw g' of plate M,respectively. Now, when a person desires to open the door from theoutside without breaking the alarm-circuit and sounding the alarm, heplaces his key upon the pin t, and, while turningit, presses inwardly.This causes the rods K and K' to turn and the linger N to bear againstand traverse the in ner face ot' plate M until it reaches the aper turein, and when it reaches said aperture it slips through the same to theouter side ot' plate M. When the person turning feels the rods yield asthe finger passes through he turns his key, say, one tooth of theratchetwheel further and relaxes his inward pressure, so that thespring,` m' then draws the linger N against the outer tace ot' plate M.After this a predetermined extent ot' movement, which will be measuredby the click ot' the pawl upon the ratchet-wheel, will bring the lingerN upon the metal plateQ, and metallic connection will then beestablished between the wires w1 and wf through screws q and q', plateQ, tingcr N, rod K, and plate M, through the aperture in which said rodslides in contact. The wires w2 and w3 are thus electrically connectedindependently ot' the wires w and w', and the circuit-closer isshort-circuited, so that the door may be opened without sounding thealarm. Having entered and closed the door the person may restore thecircuit to its normal condition by placing his key upon the piu L andturning it until the finger N finds the slot m, through which it will bedrawn by the action of spring m'.

The plate Q is to be placed at different distances from the slot m inthe various cut-outs, and the authorized users should keep secret thenumber of clicks of the pawl which indicate the completion of the shortcircuit by contact ot' tinger N and plate Q.

I may use a continuous straight rod instead of thejointed rods K and K',and do not conv tine myself to any particular position for the locationof the cut-outs, it only being necessary that the ends of the rods orrod shall be accessible from within and without respectively.

Vhat I claim is- 1. In a cut-out for burglar-alarm circuits, thecombination of the rod K, forced in one direction by a spring, andprovided with finger N, the plate M, and the insulated plate Q,substantially as described.

2. In a cut-out for luirglar-alarm circuits, the combination ofthecasing H, the rod K, arranged to rotate and move longitudinally in saidcasing, the linger projectingfrom said rod, the centrally-perforated andsuitablysupported plate M, having slot m, and theinsulated pla-te Q,carried by said plate M, substantially as described.

3. 'lhe combination of the casing FI, the rod K, provided with theratchet-wheel, and means for operation by a key, a pawl to engage saidratchet-wheel, a spring to move said rod in one direction, the lingerprojecting from said rod, the suitably-supported plate M, vhaving` acentral aperture, anda radial slot opening into said aperture, and theinsulated plate Q, all arranged to operate substantiallyas described.

4. A burglar-alarm circuit provided with a circuit-breaker and acutoutarranged to shortcircuit said circuit-breaker, and provided with meansof operation from both sides of a wall or door, substantially asdescribed.

.5. The combination, with the rod K, coustructcd and arranged in acut-out, as described, ot' the rod K', connected therewith by auniversal joint, substantially as and for the purpose set forth. l

In testimony whereof I a'tlix my signature in presence ot' twowitnesses.

VILLIAM H. SA WY E lt.

Witnesses:

GEORGE` B. Banaows, Amon J. BOWEN.

IIO

IIS

